Putty molding and trimming machine



arch 18 1924. 1,47,16 23 A. HUGHES I PUTTY MOLDING AND TRIMMING MACHINE Filed Aug. 25", 192? 3 sheetsvsheet 1 Maw 1 1924. 1,487,162

A.HUGHES i PUTTY MOLDING AND TRIMMING MACHINE Filed Aug. 25 1922 5 Sheets-Sheet 2 fi L [M Hi Marsh 18 19240 A. HUGHES PUTTY MOLDING AND TRIMMING MACHINE .t w NW :2

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i! mati @ww w H mm w fim |i Q Patented Mar. '18, 1924.

PATENT- ARTHUR HUGHES, OF LOS ANGELES, CALIFORNIA.

' PUTTY MOLDING AND TRIMMING MACHINE.

Application filed August 25, 1922. Serial No. 584,295.

above mentioned class wherein the molding is effected by a head operated by fluid pressure which is adapted to move in and out of a mould or matrix.

:Another object is to provide a putty trimming mechanism whereby the trimming is efl'ected by one movement of a single lever.

I accomplish these objects by a mechanism, a practical embodiment of which is herein disclosed by the following description ofthe accompanying drawings and the novel features thereof pointed out in the appended claims.

Referring to the drawings, 7

Figure 1 is a top plan view with parts broken awayand shown in section.

F ig, 2 is a front elevation showing the leather as it appears after pressure has been applied, with parts broken away and shown in section.

Fig. 3 is longitudinal section on the line 3-3 of Fig. 1, wherein certain parts of the fiuid pressure mechanism are shown in side elevation.

Fig. 4 is a transverse section on the line 4-4: of Fig. 1 on a reduced scale showing the stamp in elevated position and the leather as it appears prior to being pressed.

Fig. 5 is a front elevation similar to Fig. 1

2 showing the cutting mechanism as it appears after the leather has been cut.

Referring b-y numerals to the accompanying drawings, 10 designates an outer mould or matrix, preferably formed of cast metal,

J the inner surface 11 being cored and finished to a shape which is curved in transverse section throughout 1ts length, while lIl lOIlgltudinal section a curve similar to that ofthe calf of a leg is formed, as shown in Fig.

7 i 3. A base portion 12 is provided from which extend vertical side "walls 13 which unite.

one movement of a lever 38.

curved in cross sectionand lie in horizontal I planes throughout theirlength.

It is necessary that the leather L be firmly clamped ina position clear of the surface 11 of the matrix as shown in Fig. 4, and to hold the leather in this position, adjustable clampmg devices are provided on each side of the. These devices consist of clamping matrix. bars 18 which extend thefull length of the sides 13 and are corrugated or toothed 0n their inner sides asdesignated at 19. In order to move the bars 18 into and out of engagement with the leather, worm and gear movements M are provided consisting of worms 20 keyed toshafts 21 mounted in bearings 22 fastened to brackets 22 which are secured to the side walls 13 by bolts or screws. e

The shafts 21 are provided at their outer ends with hand wheels or cranks 23. for

rotating same. r The worms 20 mesh with;

means of pins 28 extending through lugs 29 on the bars 18.

In order to press the leather into the IQE."

matrix, a head or press 30 is utilized, the a under surface 31 being of substantiallythe same shape as the inner surface of the matrix. v I v The top surface 33 of the headis flat horizontal-ly and curved at its forward and rear ends 34? and 35?, while the front and rear ends 34 and 35 are fiat and at right angles to the surface 33; these surfaces forming a pattern for the trimming of the leather.

anism adapted to operate cutting blades86 and 37 which trim the leatherinto shape by The blades 36 and 37 extend across the upper surface 33 of the head 30 and are then curved downwardly at their forward and rear ends 36 and 37 then curved inwardly as designated at 36 and-37 and overlap each other at the terminus of the curved portions as designated at 39, as clearly shown in Fig. 2.

The blades 36 and 37 are adaptedto move 2 simultaneously in opposite directions, and this movement is effected by a mechanism consisting of a shaft {10 mounted in sets of bearings 41 fastened to the top of the head '95 The trimming isaccomplished by a mech- 30 near its forwardand rear ends, and fixed to the shaft is the lever 38 and also fixed to the shaft 40 between the sets of bearings 11 are rocker arms id, having oppositely disposed pivot pins and 46 to which are connected links 45 and 46 also pivoted to brackets 36 and 37 fastened to the cutting blades 36 and 37.

Fixed to the forward and rear ends of the shaft are rocker arms 48 to which are connected links 19, which are in turn connected to quadrants pivoted to the front and rear ends of the head 30 as designated at 50, by pins 49* and 50. The quadrantsSO are provided with oppositely disposed pivot pins 50 and 50 to which are connected links and 52- also connected by pins 51 and 52 which are fastened to the curved portions of the blades 35 and In order to hold the cutting blades in contact with the surfaces of the head, guide plates 53 and 54 are fastened to the surface 33 and partially extend over the top sides of the blades 36 and 37. while other guide plates 55 hold the curved portions 36 and 37 against the front and rear surfaces 8d and When the blades ,cut through the leather it is necessary to provide cushions in order to prevent dulling or breaking, and for this purpose I provide wood or fibre inserts 56 in grooves 56 on the inner sides of the matrix opposite the cutting edges of the blades 36 and 37.

In order to raise and lower the head 30 and press the leather into shape, a suitable pressure mechanism is employed which is preferably operated by hydraulic pressure taken from municipal water mains from a static pressure tank. This mechanism consists of a large cylinder 57 and a small cylinder 58 mounted on an arched member A extending over the top of the machine and fastened to the base 12. The large cylinder 57 is provided with a piston 59 from which extends a rod 60 through a stufiing box 61 and is connected to the head by a yoke 62 which straddles the shaft 40. The cylinder is provided with a pressure gauge G and has inlet and outlet ports at its upper lower ends to which are connected pipes 63 and 64 also connected to a. four-way valve The valve 65 is provided with threaded openings 66 and 67 to which are connected pipes 68 and 69. The pipe 68 is used for dischargin while the pipe 69 is connected to the cylinder 58- The small cylinder 58 is utilized to increase pressure in the large cylinder above that of the static pressure referred to when it is necessary to press the leather, the static pressure being sufficient to raise and lower the head into and out of the matrix. The cylinder 58 is provided with a piston 78 moved by a rod 79 connected to a lever 80 and is provided with check valves 71 and 72 in chambers 73 and 74 having seats 75 and 76." It will be seen that this mechanism provides a hydraulic pump.

Water is introduced into the system through a pipe 70 connected to the cylinder and will normally flow through the cylinder 58 and valve 65 to the upper or lower end of the cylinder according to the position of said valve. The valve 65 is operated by a valve stem 65 provided with a handle (55.

Having thus described the construction of my invention, I will now describe the operation of same, which is as follows:

Assuming that the head 30 has been raised clear of the mould or matrix as shown in Fig. 47, a piece of leather is then inserted between the head and matrix, the sides are then turner down over the top surfaces of the side walls 13 and clamped by means of the clamping bars 18. The valve 65 is then moved into a position shown in Fig. which allows water to flow through the small cylinder 58, pipe 69 and valve (35, thence through pipe 68 to the top of the cylinder 57 exerting a pressure on the piston 59 which forces the head downwardly onto the leather and partially presses the same into shape. After the piston ceases to move l y static pressure, the lever is then operated until a predetermined pressure is indicated by the gauge C. The lever 88 is then moved downward to a position shown in Fig. 5 trimming the leather. It is obvious that by reversing the above operation the finished product may be removed.

Various modifications and changes may b made herein without departing from the spirit of the invention as claimed.

lVhat is claimed is:

1. A putty molding and trimming machine comprising a matrix having an inner surface curved in cross section throughout its length and curved in longitudinal section similar to that of the calf of a leg, clamping means for holding a strip of leather clear of the sides and bottom, a head adapted to be moved into and from said matrix and having a surface on its under side substantially of the same shape as the inner surface of the matrix, and means for operating said head, and a trimming mechanism mounted on said head.

2. A putty molding and trimming machine comprising a matrix having an inner surface curved in cross section throughout its length and curved in longitudinal section similar to that of the calf of a leg, said matrix being open at each end, one end being larger than the other, clamping means for holding a strip of leather clear of the sides and bottom, a head adapted to be moved into and from said matrix and having a surface on its under side substantially of the same shape as the inner surface of the matrix, means for operating said head,

and a trimming mechanism mounted on said head.

3. A putt-y molding and trimming machine comprising a matrix having an inner surface curved in cross section throughout its length and curved in longitudinal Se"- tion similar to that of the calf of a leg, clamping means for holding a strip of leather clear of the sides and bottom, a heagl adapted to be moved into and from said matrix and-having a surface on its under side substantially of the same shape as the inner surface of the matrix, means for operating said head, a trimming mechanish including cutters mounted on said head, and a lever for actuating said cutters.

4:. In a putty molding and trimmingmachine, the combination of a bottom mould, a trimming mechanism and a presser head, said trimming mechanism consisting of a shaft mounted on said head, duplex blades at the ends 01" the. mould, a series of rocker arms and links operated by the shaft adapt-- ed to move the duplex trimming blades in opposite directions to e'fi'ect a complete trimming of a strip of leather in one action.

able after the head has passed into the mould.

(3. In a putty molding and trimming maichine, the combination of a trimming mechanis'm and a presser head, said trimming mechanism consisting of a shaft inounted' on said head, a series or" rocker arms and links adapted to move duplex trimming blades in opposite directions to effect a complete trimming of a strip of leather in one action, the said mechanism being manually operable after the head liaspassed into the mould, said mechanism including a single manually. operable lever. v

In testimony whereof I have signed my name to this specification.

. ARTHUR HUGHES. 

